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一、引言 静态超高压高温技术的发展,为研究人造优质大颗粒超硬材料开辟了新的前景。一般磨料级人造金刚石的合成,所用压力为60千巴左右,当压力提高时,例如77千巴以上,从实验可知,可得到巴拉斯和黑金刚石类型的大颗粒多晶体。因此,静态超高压高温容器,除一般要求外,一个重要的条件就是能产生较高的压力,例如100千巴左右,甚至更高。 在提高压力方面,已有各种类型容器的设计和改进。本文提出一种新的多级多压砧容器,并介绍其中最简单的双级四压砧(四面体)容器、校压达100千巴的若干实验结果。
I. INTRODUCTION The development of static high pressure and high temperature technology has opened up a new prospect for the research of man-made high-quality large-particle superhard materials. General synthetic grade synthetic diamond, the pressure used is about 60 kPa, when the pressure increases, such as 77 kpa above, we can see from the experiment, can get large black and white diamond type polycrystal. Therefore, in addition to the general requirements for static UHVDC containers, an important condition is that higher pressures may be generated, for example about 100 kilobars or even higher. There have been designs and improvements of various types of containers to increase the pressure. This paper presents a new multi-stage multi-pressure anvil container, and introduces the simplest two-stage four-pressure anvil (tetrahedron) container, the school pressure up to 100 kilobars of a number of experimental results.